reactos/subsys/win32k/objects/gdiobj.c

   1 /*
   2  * GDIOBJ.C - GDI object manipulation routines
   3  *
   4  * $Id: gdiobj.c,v 1.4 1999/11/17 20:54:05 rex Exp $
   5  *
   6  */
   7
   8 #undef WIN32_LEAN_AND_MEAN
   9 #include <windows.h>
  10 #include <ddk/ntddk.h>
  11 #include <win32k/gdiobj.h>
  12
  13 PGDIOBJ  GDIOBJ_AllocObject(WORD Size, WORD Magic)
  14 {
  15   PGDIOBJHDR  NewObj;
  16
  17   NewObj = ExAllocatePool(PagedPool, Size + sizeof (GDIOBJHDR));
  18   if (NewObj == NULL)
  19     {
  20       return  NULL;
  21     }
  22
  23   RtlZeroMemory(NewObj, Size + sizeof (GDIOBJHDR));
  24   NewObj->wMagic = Magic;
  25 #if 0
  26   KeInitializeSpinlock(&NewObj->Lock);
  27 #endif
  28
  29   return  (PGDIOBJ)(((PCHAR) NewObj) + sizeof (GDIOBJHDR));
  30 }
  31
  32 HGDIOBJ  GDIOBJ_PtrToHandle (PGDIOBJ Obj, WORD Magic)
  33 {
  34   PGDIOBJHDR  objHeader;
  35
  36   objHeader = (PGDIOBJHDR) (((PCHAR)Obj) - sizeof (GDIOBJHDR));
  37   if (objHeader->wMagic != Magic)
  38     {
  39       return  0;
  40     }
  41
  42   return  (HGDIOBJ) objHeader;
  43 }
  44
  45 PGDIOBJ  GDIOBJ_HandleToPtr (HGDIOBJ Obj, WORD Magic)
  46 {
  47   PGDIOBJHDR  objHeader;
  48
  49   objHeader = (PGDIOBJHDR) Obj;
  50
  51   /*  FIXME: Lock object for duration  */
  52
  53   if (objHeader->wMagic != Magic)
  54     {
  55       return  0;
  56     }
  57
  58   return  (PGDIOBJ) (((PCHAR)Obj) + sizeof (GDIOBJHDR));
  59 }
  60
  61 BOOL  GDIOBJ_LockObject (HGDIOBJ Obj)
  62 {
  63   /* FIXME: write this  */
  64   return  TRUE;
  65 }
  66
  67 BOOL  GDIOBJ_UnlockObject (HGDIOBJ Obj)
  68 {
  69   /* FIXME: write this  */
  70   return  TRUE;
  71 }
  72
  73 HGDIOBJ  GDIOBJ_GetNextObject (HGDIOBJ Obj, WORD Magic)
  74 {
  75   PGDIOBJHDR  objHeader;
  76
  77   objHeader = (PGDIOBJHDR) ((PCHAR) Obj - sizeof (GDIOBJHDR));
  78   if (objHeader->wMagic != Magic)
  79     {
  80       return 0;
  81     }
  82
  83   return objHeader->hNext;
  84 }
  85
  86 HGDIOBJ  GDIOBJ_SetNextObject (HGDIOBJ Obj, WORD Magic, HGDIOBJ NextObj)
  87 {
  88   PGDIOBJHDR  objHeader;
  89   HGDIOBJ  oldNext;
  90
  91   /* FIXME: should we lock/unlock the object here? */
  92   objHeader = (PGDIOBJHDR) ((PCHAR) Obj - sizeof (GDIOBJHDR));
  93   if (objHeader->wMagic != Magic)
  94     {
  95       return  0;
  96     }
  97   oldNext = objHeader->hNext;
  98   objHeader->hNext = NextObj;
  99
 100   return  oldNext;
 101 }
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